 William Pole-Tylney-Long-Wellesley, 5th Earl of Mornington

William Richard Arthur Pole-Tylney-Long-Wellesley, 5th Earl of Mornington (7 October 1813 – 25 July 1863) was a British nobleman.Long-Wellesley, the son of the notorious spendthrift William Pole-Tylney-Long-Wellesley (later fourth Earl of Mornington) and Catherine Tylney-Long (daughter of Sir James Tylney-Long, 7th Baronet), was born on 7 October 1813 at Wanstead House, at that time in Essex, but within the London borough of Redbridge since 1965.